Java tutorial
/*- * Copyright 2009 Diamond Light Source Ltd., Science and Technology * Facilities Council Daresbury Laboratory * * This file is part of GDA. * * GDA is free software: you can redistribute it and/or modify it under the * terms of the GNU General Public License version 3 as published by the Free * Software Foundation. * * GDA is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License along * with GDA. If not, see <http://www.gnu.org/licenses/>. */ package gda.plots; import java.awt.BasicStroke; import java.awt.Graphics2D; import java.awt.Image; import java.awt.Point; import java.awt.Shape; import java.awt.geom.Rectangle2D; import org.jfree.chart.LegendItem; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.entity.EntityCollection; import org.jfree.chart.plot.CrosshairState; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.PlotRenderingInfo; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.StandardXYItemRenderer; import org.jfree.chart.renderer.xy.XYItemRendererState; import org.jfree.data.xy.XYDataset; import org.jfree.ui.RectangleEdge; import org.jfree.util.ShapeUtilities; /** * Extends StandardXYItemRenderer in order to force the dataset to be a SimpleXYSeriesCollection and to use the Paint, * Stroke etc from the SimpleXYSeries. */ public class SimpleXYItemRenderer extends StandardXYItemRenderer { protected SimpleValueTransformer xValueTransformer; /** * Constructor. */ public SimpleXYItemRenderer() { xValueTransformer = new SimpleValueTransformer() { @Override public double transformValue(double toBeTransformed) { return toBeTransformed; } @Override public double transformValueBack(double toBeTransformedBack) { return toBeTransformedBack; } }; } /** * Draws the visual representation of a single data item. This mostly reproduces the code of StandardXYItemRenderer * but using the line by line information stored in the SimpleXYSeries instead of the series indexed information * stored in the Renderer itself. * * @param g2 * the graphics device. * @param state * the renderer state. * @param dataArea * the area within which the data is being drawn. * @param info * collects information about the drawing. * @param plot * the plot (can be used to obtain standard color information etc). * @param domainAxis * the domain axis. * @param rangeAxis * the range axis. * @param dataset * the dataset. * @param series * the series index (zero-based). * @param item * the item index (zero-based). * @param crosshairState * crosshair information for the plot ( <code>null</code> permitted). * @param pass * the pass index. */ @Override public void drawItem(Graphics2D g2, XYItemRendererState state, Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot, ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset, int series, int item, CrosshairState crosshairState, int pass) { SimpleXYSeries sxys = (SimpleXYSeries) ((SimpleXYSeriesCollection) dataset).getSeries(series); if (!sxys.isVisible()) { return; } // setup for collecting optional entity info... Shape entityArea = null; EntityCollection entities = null; if (info != null) { entities = info.getOwner().getEntityCollection(); } PlotOrientation orientation = plot.getOrientation(); g2.setPaint(sxys.getPaint()); g2.setStroke(sxys.getStroke()); // get the data point double x1 = dataset.getXValue(series, item); double y1 = dataset.getYValue(series, item); // Test x1 = xValueTransformer.transformValue(x1); if (Double.isNaN(x1) || Double.isNaN(y1)) { return; } RectangleEdge xAxisLocation = plot.getDomainAxisEdge(); RectangleEdge yAxisLocation = plot.getRangeAxisEdge(); double transX1 = domainAxis.valueToJava2D(x1, dataArea, xAxisLocation); double transY1 = rangeAxis.valueToJava2D(y1, dataArea, yAxisLocation); if (sxys.isDrawLines()) { if (item > 0) { // get the previous data point... double x0 = dataset.getXValue(series, item - 1); double y0 = dataset.getYValue(series, item - 1); // Test // System.out.print("tranformed " + x0); x0 = xValueTransformer.transformValue(x0); // Message.debug(" to " + x0); if (!Double.isNaN(x0) && !Double.isNaN(y0)) { boolean drawLine = true; if (getPlotDiscontinuous()) { // only draw a line if the gap between the current and // previous data // point is within the threshold int numX = dataset.getItemCount(series); double minX = dataset.getXValue(series, 0); double maxX = dataset.getXValue(series, numX - 1); drawLine = (x1 - x0) <= ((maxX - minX) / numX * getGapThreshold()); } if (drawLine) { double transX0 = domainAxis.valueToJava2D(x0, dataArea, xAxisLocation); double transY0 = rangeAxis.valueToJava2D(y0, dataArea, yAxisLocation); // only draw if we have good values if (Double.isNaN(transX0) || Double.isNaN(transY0) || Double.isNaN(transX1) || Double.isNaN(transY1)) { return; } if (orientation == PlotOrientation.HORIZONTAL) { state.workingLine.setLine(transY0, transX0, transY1, transX1); } else if (orientation == PlotOrientation.VERTICAL) { state.workingLine.setLine(transX0, transY0, transX1, transY1); } if (state.workingLine.intersects(dataArea)) { g2.draw(state.workingLine); } } } } } if (sxys.isDrawMarkers()) { Shape shape = sxys.getSymbol(); if (orientation == PlotOrientation.HORIZONTAL) { shape = ShapeUtilities.createTranslatedShape(shape, transY1, transX1); } else if (orientation == PlotOrientation.VERTICAL) { shape = ShapeUtilities.createTranslatedShape(shape, transX1, transY1); } if (shape.intersects(dataArea)) { g2.setPaint(sxys.getSymbolPaint()); // Always use full stroke for drawing marker g2.setStroke(new BasicStroke()); if (sxys.getFilled()) { g2.fill(shape); } else { g2.draw(shape); } g2.setPaint(sxys.getPaint()); g2.setStroke(sxys.getStroke()); } entityArea = shape; } if (getPlotImages()) { // use shape scale with transform?? // double scale = getShapeScale(plot, series, item, transX1, // transY1); Image image = getImage(plot, series, item, transX1, transY1); if (image != null) { Point hotspot = getImageHotspot(plot, series, item, transX1, transY1, image); g2.drawImage(image, (int) (transX1 - hotspot.getX()), (int) (transY1 - hotspot.getY()), null); entityArea = new Rectangle2D.Double(transX1 - hotspot.getX(), transY1 - hotspot.getY(), image.getWidth(null), image.getHeight(null)); } } // draw the item label if there is one... if (isItemLabelVisible(series, item)) { drawItemLabel(g2, orientation, dataset, series, item, transX1, transY1, (y1 < 0.0)); } updateCrosshairValues(crosshairState, x1, y1, transX1, transY1, orientation); // add an entity for the item... if (entities != null) { addEntity(entities, entityArea, dataset, series, item, transX1, transY1); } } /** * Creates a LegendItem for a SimpleXYSeries in the dataset - note that here we create a SimpleLegendItem which * knows about the data it belongs to. * * @param datasetIndex * which dataset (left or right effectively) * @param series * which data series * @return the created legend */ @Override public LegendItem getLegendItem(int datasetIndex, int series) { LegendItem result = null; XYPlot plot = getPlot(); if (plot != null) { SimpleXYSeriesCollection dataset = (SimpleXYSeriesCollection) plot.getDataset(datasetIndex); if (dataset != null) { SimpleXYSeries sxys = (SimpleXYSeries) dataset.getSeries(series); if (sxys.isVisible() && sxys.isVisibleInLegend()) { result = new SimpleLegendItem(sxys); } } } return result; } /** * Gets the x value transformer * * @see #setXValueTransformer for an explanation of SimpleValueTransformer. * @return the x value transformer. */ SimpleValueTransformer getXValueTransformer() { return xValueTransformer; } /** * Sets the x value transformer * * @see #setXValueTransformer for an explanation of SimpleValueTransformer. * @param valueTransformer * the new xValueTransformer */ void setXValueTransformer(SimpleValueTransformer valueTransformer) { xValueTransformer = valueTransformer; } }